Hesham/wireguard-android
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tunnel: add windows-style killswitch semantics for GoBackend

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Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
This commit is contained in:
Jason A. Donenfeld 2020-05-04 02:30:41 -06:00
parent 3208bac987
commit 8e2d63db75
1 changed files with 12 additions and 1 deletions
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13
tunnel/src/main/java/com/wireguard/android/backend/GoBackend.java
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@ -9,6 +9,7 @@ import android.content.Context;
import android.content.Intent;
import android.os.Build;
import android.os.ParcelFileDescriptor;
import android.system.OsConstants;
import android.util.Log;
import com.wireguard.android.backend.BackendException.Reason;
@ -202,9 +203,19 @@ public final class GoBackend implements Backend {
for (final InetAddress addr : config.getInterface().getDnsServers())
builder.addDnsServer(addr.getHostAddress());
boolean sawDefaultRoute = false;
for (final Peer peer : config.getPeers()) {
for (final InetNetwork addr : peer.getAllowedIps())
for (final InetNetwork addr : peer.getAllowedIps()) {
if (addr.getMask() == 0)
sawDefaultRoute = true;
builder.addRoute(addr.getAddress(), addr.getMask());
}
}
// "Kill-switch" semantics
if (!(sawDefaultRoute && config.getPeers().size() == 1)) {
builder.allowFamily(OsConstants.AF_INET);
builder.allowFamily(OsConstants.AF_INET6);
}
builder.setMtu(config.getInterface().getMtu().orElse(1280));